For now you’re already posting on the best Lemmy instance for that sort of discussion (lemmy.dbzer0.com).
Search around, there’s been a bunch of discussion re: FMHY and their instance being down e.g. lemmy.dbzer0.com/post/1091528
Their website is still up (fmhy.net) & they’re working on bringing their instance back up. I think the tricky part is whether they can still keep their old posts/comments/user accounts and re-federate with a new domain, I’m not so sure if that’s actually possible. Personally I think the old .ml instance is new enough that if they need to re-start from scratch on a new domain then may as well go for it.
Also see the comments in the other post, they do seem to have announcements about this at very.bignutty.xyz/